Throw in squats and olympic exercises you dont always need a squat rack to squat and you need more compund exercises in your workout also you should be doin 3/4 sets and about 10reps or higher each set with 1minute rest inbetween those sets.

Laurie1 wrote: is that the thing that has all the things like how to build 50 pounds of muscle in 12 months etc.

Yes. But often your only limited to things you have at home. Do you really think you have enough weights do deadlift 4 times? I work at a gym if you go in and ask if you can try out their gym to see if you like it or not, often times they will let you. You need to really adapt your training around your equipment to make it work for you.

Oh yeh something I missed out when your lifting go slow so you feel the contraction better and make sure your thinking about the muscle your training this apperantly recruits more muscle fibres and motor units and EAT! fuck loads.

All I have to say is that your 15 years old and you have A LOT of years ahead of you of training and reading. Heck I started at 15 learning and training. Luckily our high school had some of the best physical educational teachers around that were specifically for PE and were not math teachers "thinking" they knew about fitness.